Screw machine solenoid valve

The solenoid valve is an industrial equipment controlled by solenoid, which is used to adjust the direction, flow, speed and other parameters of the medium in the industrial control system. Electromagnetic valves are controlled by electromagnetic effects, with the main control method being relay control. In this way, the solenoid valve can cooperate with different circuits to achieve the expected control, while ensuring the accuracy and flexibility of the control. There are many types of solenoid valves, and different solenoid valves play a role in different positions of the control system. The most commonly used ones are one-way valves, safety valves, directional control valves, speed regulating valves, etc.

1、 Security 　

2： Applicability 　　

The fluid in the pipeline must be consistent with the medium calibrated in the selected solenoid valve series model. The temperature of the fluid must be lower than the calibration temperature of the selected solenoid valve. Electromagnetic valves allow liquid viscosity to generally be below 20CST, and if it exceeds 20CST, it should be noted. When the maximum pressure difference in the pipeline is less than 0.04MPa, direct acting and step-by-step direct acting types such as ZS, 2W, ZQDF, ZCM series should be selected; When the minimum working pressure difference is greater than 0.04MPa, a pilot operated (differential pressure) solenoid valve can be selected; The maximum working pressure difference should be less than the maximum calibration pressure of the solenoid valve; Generally, solenoid valves work in a one-way manner, so attention should be paid to whether there is a reverse pressure difference, and if a check valve is installed. When the fluid cleanliness is not high, a filter should be installed in front of the solenoid valve. Generally, solenoid valves require good cleanliness of the medium. Pay attention to the flow aperture and pipe diameter; Electromagnetic valves are generally only controlled by a switch with two positions; If conditions permit, please install a bypass pipe for easy maintenance; When there is water hammer phenomenon, it is necessary to customize the opening and closing time adjustment of the solenoid valve. Pay attention to the influence of environmental temperature on solenoid valves. The power supply current and power consumption should be selected according to the output capacity. The power supply voltage is generally allowed to be around ± 10%. It is necessary to pay attention to the high VA value during AC starting.

3、 Reliability

Electromagnetic valves are divided into two types: normally closed and normally open; Generally, the normally closed type is selected, which opens when powered on and closes when powered off; But when the opening time is long and the closing time is short, the normally open type should be selected. Life testing is generally a type testing project in factories. To be precise, there is no professional standard for solenoid valves in China, so caution should be exercised when selecting solenoid valve manufacturers. When the action time is short and the frequency is high, the direct action type is generally selected, and the fast series is selected for large caliber.

4、 Economic viability　

There are many solenoid valves that can be used universally, but the most economical product should be selected on the basis of meeting the above three points.